Refrigeration can harden guava seeds, making them even more difficult to chew. This is due to the cold temperature affecting the seed's moisture content and structure.
Guava seeds are naturally quite hard. When guava is refrigerated, the cold temperatures cause the moisture within the seeds to potentially freeze or undergo changes in its crystalline structure. This process can lead to the seeds becoming even harder and more brittle. The cell walls within the seed may also be affected, contributing to the altered texture. While refrigeration is excellent for preserving the guava fruit itself, it's important to be aware of its impact on the seeds' texture. Some people find the hardened seeds unpleasant, while others don't mind. The effect can also vary depending on the specific variety of guava and the duration of refrigeration.
If you find the hardened seeds unappealing after refrigeration, consider removing them before chilling the guava or simply eating the guava at room temperature. Alternatively, blend the guava into a smoothie; the blending process will break down the seeds, making them less noticeable.